options:
  - request_method: 1
    request_body_size: 10
    request_headers:
      - { header: { key: ":path", value: "/a" } }  
      - { header: { key: "x-nighthawk-test-server-config", value: "{response_body_size:13}" } }
  - request_method: 1
    request_body_size: 10
    request_headers:
      - { header: { key: ":path", value: "/b" } }  
      - { header: { key: "x-nighthawk-test-server-config", value: "{response_body_size:17}" } }  